NASDAQ:ASYS | Historical Stock Price | AMTECH SYSTEMS INC

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1983-08-09 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.95$1.88$3.70$7.31$14.44$28.521983-08-092026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 1983

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1983-12-30$10.00$10.00295——
1983-12-29$10.00$10.001,533——
1983-12-28$10.00$10.001,863——
1983-12-27$10.00$10.001,125——
1983-12-23$10.00$10.001,600——
1983-12-22$10.00$10.002,875——
1983-12-21$10.00$10.001,945——
1983-12-20$10.00$10.002,080——
1983-12-19$10.00$10.001,785——
1983-12-16$15.00$15.001,258——
1983-12-15$15.00$15.001,778——
1983-12-14$10.00$10.001,710——
1983-12-13$10.00$10.00370——
1983-12-12$10.00$10.00598——
1983-12-09$10.00$10.00788——
1983-12-08$10.00$10.00405——
1983-12-07$10.00$10.00768——
1983-12-06$10.00$10.001,688——
1983-12-05$10.00$10.001,753——
1983-12-02$15.00$15.002,290——
1983-12-01$15.00$15.001,805——
1983-11-30$15.00$15.002,363——
1983-11-29$15.00$15.002,023——
1983-11-28$15.00$15.001,303——
1983-11-25$15.00$15.002,170——
1983-11-23$15.00$15.003,375——
1983-11-22$15.00$15.002,320——
1983-11-21$10.00$10.001,618——
1983-11-18$10.00$10.001,543——
1983-11-17$10.00$10.005,380——
1983-11-16$10.00$10.002,538——
1983-11-15$10.00$10.002,323——
1983-11-14$15.00$15.00610——
1983-11-11$10.00$10.004,710——
1983-11-10$15.00$15.003,335——
1983-11-09$15.00$15.003,590——
1983-11-08$15.00$15.00813——
1983-11-07$15.00$15.003,700——
1983-11-04$15.00$15.001,680——
1983-11-03$15.00$15.002,155——
1983-11-02$15.00$15.00705——
1983-11-01$15.00$15.001,745——
1983-10-31$15.00$15.001,175——
1983-10-28$15.00$15.002,008——
1983-10-27$15.00$15.00753——
1983-10-26$15.00$15.00708——
1983-10-25$15.00$15.002,133——
1983-10-24$15.00$15.001,435——
1983-10-21$15.00$15.005,135——
1983-10-20$10.00$10.005,690——
1983-10-19$10.00$10.002,130——
1983-10-18$15.00$15.003,993——
1983-10-17$15.00$15.004,673——
1983-10-14$15.00$15.003,930——
1983-10-13$15.00$15.003,648——
1983-10-12$15.00$15.001,675——
1983-10-11$15.00$15.007,878——
1983-10-10$15.00$15.003,173——
1983-10-07$15.00$15.002,798——
1983-10-06$15.00$15.005,373——
1983-10-05$15.00$15.008,750——
1983-10-04$15.00$15.0011,475——
1983-10-03$15.00$15.002,183——
1983-09-30$15.00$15.005,538——
1983-09-29$15.00$15.005,808——
1983-09-28$15.00$15.006,135——
1983-09-27$15.00$15.009,455——
1983-09-26$15.00$15.004,503——
1983-09-23$15.00$15.005,118——
1983-09-22$10.00$10.007,470——
1983-09-21$10.00$10.003,065——
1983-09-20$10.00$10.002,623——
1983-09-19$10.00$10.002,523——
1983-09-16$10.00$10.0011,398——
1983-09-15$10.00$10.005,923——
1983-09-14$10.00$10.003,735——
1983-09-13$10.00$10.003,020——
1983-09-12$10.00$10.004,520——
1983-09-09$10.00$10.005,855——
1983-09-08$10.00$10.002,260——
1983-09-07$10.00$10.008,120——
1983-09-06$10.00$10.005,655——
1983-09-02$10.00$10.003,900——
1983-09-01$10.00$10.003,458——
1983-08-31$10.00$10.002,848——
1983-08-30$10.00$10.009,668——
1983-08-29$10.00$10.005,285——
1983-08-26$10.00$10.003,220——
1983-08-25$10.00$10.002,430——
1983-08-24$10.00$10.003,190——
1983-08-23$10.00$10.003,870——
1983-08-22$10.00$10.003,703——
1983-08-19$15.00$15.007,953——
1983-08-18$10.00$10.007,053——
1983-08-17$10.00$10.006,960——
1983-08-16$10.00$10.006,373——
1983-08-15$10.00$10.0012,975——
1983-08-12$15.00$15.008,435——
1983-08-11$15.00$15.0010,115——
1983-08-10$10.00$10.0014,798——
1983-08-09$10.00$10.0036,615——